Servitors

Hail Brothers,
I have yet another question that hasn't been fully clear to me since I can't find a specific ruling for this issue and I'm still new to the game.

After reading over some forums, I've learned that sitting an Inquisitor in a rhino/chimera is useful especially if he's real shooty with Gun-Servitors. What I'd like to know is, are the Gun-Servitors capable firing heavy weapons like the Heavy Bolter, Multi-Melta, and the Plasma Cannon without any issues from being passengers within a transport.

Our Chimeras have two fire points so two weapons can fire from it. Being heavy weapons psycannons, hb's, m-m's and plasma cannons cannot fire at all if the vehicle moves. If the vehicle is stationary then the two weapons fire normally.

I've known about the chimera, but its good to finally have this question answered. Thank you brother.